Wrench.



J. G. GRANGER.

WRENCH.

APPLICATION FILED 001225, 1911.

1,015,883,- Patented Ja.11.30, 1912.

JAMES C. GRANGER, 0E COTTONWOOD, ALABAMA.

WRENCH.

Specification of Letters Patent.

Application filed October 25, 1911.

Patented Jan. 30, 1912. Serial No. 656,568.

To all whom it may concern:

Be it known that I, JAMES C. GRANGER, a citizen of the United States, residing at Cottonwood, in the county of Houston and State of Alabama, have invented certain new and useful Improvements in renches, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in wrenches of that type wherein the adjustable wrench jaw is slidably mounted upon the shank, the invention having for its principal objectto provide an extremely simple and efficient locking means for said sliding jaw whereby the same is rigidly held in its adjusted position.

Another object of the invention is to provide a spring controlled locking dog pivotally mounted on the sliding jaw and nor mally held out of its locking position, and means carried by the jaw co-acting with said dog to retain the same in its locking position.

With the above and other objects in view, the invention consists of the novel features of construction, combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a wrench embodying my improvements showing the adjustable jaw looked upon the wrench shank, the locking dog being illustrated in its normal position in dotted lines; Fig. 2

- is a detail horizontal section taken on the line 22 of Fig. 1; Fig. 3 is a detail inverted perspective view of the dog engaging cap; and Fig. 4 is a detail perspective view of the locking dog.

' Referring in detail to the drawing 5 designates the wrench shank upon'one end of which the stationary jaw 6 is formed, said shank being provided with a series of rack teeth 7 upon one of its longitudinal edges. A suitable handle 8 is secured to the other end of the wrench shank and upon said shank the adjustable jaw 9 is slidably mounted. This jaw embraces the wrench shank at its upper and lower ends and upon the latter end thereof the laterally extending ears 10 are formed. In these cars the ends of a pivot pin 11 are rigidly fixed and on this pin the locking pawl or dog 12 is pivotally mounted. A coiled spring 13 is arranged upon the pin 11, said locking dog being provided with a recess 13 for the reception of said spring which acts tonor- Inally hold the locking dog in the dotted line position shown in Fig. 1 wherein the lower end 12 of the dog is out of engagement with the rack teeth 7 on the wrench shank. This .end of the dog is of greater cross sectional area than the remaining portion thereof whereby the shoulders 1A are formed for engagement with the lower edges of the ears 10 whereby undue strain upon the pivot pin 11 in the application and use of the wrench is avoided. A cap 1-5 is pivoted upon the sliding jaw 9 adjacent its upper endas indicated at 16. The body portion of this cap is preferably circular in form and the annular wall of said cap has its edge inclined as indicated at 17 so that the socket in the cap is of greater depth on one side than on the other. Upon the shallower side of this socket, a lip 18 is formed which is provided with a beveled face 19 with which the upper end of the dog 12 is adapted to engage. A leaf spring 20 is fixed at one end to the sliding jaw and bears upon said cap to retain the same in engagement with the end of the dog.

From the foregoing description it is believed that the operation of the device will be obvious.

hen it is desired to lock the sliding jaw on the wrench shank, the lower end of the dog 12 is forced into engagement with the rack teeth 7 of the shank and the outward movement of the upper end of said dog lifts the cap 15 against the tension of the spring 20, said dog engaging the beveled face 19 of said cap as heretofore explained. It will thus be seen that the cap 15 will hold the dog in its locking position against the tension of the spring 13. The adjustable jaw may be easily and quickly released by simply pressing upwardly upon the cap 15 with the thumb to remove the same from the end of the dog 12, the spring 13 immediately returning said dog to its normal position.

My improved wrench is simple in con struction, highly eficient and durable in practical use, and provides means whereby the sliding jaw may be very easily and quickly adjusted and rigidly held upon the wrench shank in such adjusted position.

WVhile I have shown and described the preferred construction and arrangement of the various parts, it will be understood that the device is susceptible of considerable modification without departing from the essential feature or sacrificing any of the advantages thereof.

Having thus described the invention what is claimed is In a wrench the combination with a shank having a stationary jaw on one end and a series of rack teeth on one of its longitudinal edges, an adjustable jaw slidable on said shank, and a dog pivotally mounted on said jaw for engagement with the rack teeth, of a holding cap pivotally mounted on said jaw and having an inclined face for engagement by the end of the locking dog, said cap also having a socket to receive the end of the dog, and a leaf spring fixed at one end to the jaw and bearing upon said cap to hold the same upon the end of the locking dog and retain the latter in its locking position.

In testimony whereof I hereunto afiiX my signature in the presence of two witnesses.

JAMES C. GRANGER. \Vitnesses S. 0. SMITH, A. L. WALFORD.

Copies of this patent ma; be obtained for Washington, D. G. 

